Humans have interrupted the nitrogen cycle by

A) digging up the stored nutrient resources and combusting them during industrial processes.

B) damming rivers and lakes.

C) increasing the rate at which land-based nitrogen is released into the environment.

D) all of the above

Option. D) all of the above

Explanation:

Humans disturb the nitrogen cycle by building dams on the passage of rivers. The nitrogen is emitted in the atmosphere from the combustion of fossil fuels and making of many products in the industries in the form of nitrious oxide etc. The use of nitrogenous fertilizer in the field for the crop also disturb the nitrogen cycle.

preservation because he preserves part of the land and preserves means save

explanation: